Microbila Degradation of a Montmorillonite-Dextran Complex1
- Alan Olness and
- C. E. Clapp2
Microorganisms capable of metabolizing the detran B-512F were isolated from a Webster clay loam soil. Suspension of cells were added to polysaccharide solutions or suspensions of clay-polysaccharide complexes in Warburg respirometers. Oxygen uptake curves, divided into three stages, indicated that the dextran was partially protected in the presence of clay. Rates of oxygen uptake in stage I (1 to 3 hours) were much higher for the systems with dextran alone than for those containing clay-dextran complexes. Rates for stages II (4 to 6 hours) and III (7 to 48 hours) were about equal for systems containing the same amount of dextran. The uptake rate in the first stage indicated a linear relationship to the amount of clay present, while the second stage was related to the amount of dextran initially present.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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